﻿//using System;
//using System.Linq;
//using System.Linq.Expressions;

//namespace Sautom.DataAccess.Helpers
//{
//    public static class PredicateBuilder
//    {
//        public static Expression<Func<T, bool>> True<T>() { return f => true; }
//        public static Expression<Func<T, bool>> False<T>() { return f => false; }

//        public static Expression<Func<T, bool>> Or<T>(this Expression<Func<T, bool>> expr1,
//                                                            Expression<Func<T, bool>> expr2)
//        {
//            var invokedExpr = Expression.Invoke(expr2, expr1.Parameters.Cast<Expression>());
//            return Expression.Lambda<Func<T, bool>>
//                  (Expression.OrElse(expr1.Body, invokedExpr), expr1.Parameters);
//        }

//        public static Expression<Func<T, bool>> And<T>(this Expression<Func<T, bool>> expr1,
//                                                             Expression<Func<T, bool>> expr2)
//        {
//            var invokedExpr = Expression.Invoke(expr2, expr1.Parameters.Cast<Expression>());
//            return Expression.Lambda<Func<T, bool>>
//                  (Expression.AndAlso(expr1.Body, invokedExpr), expr1.Parameters);
//        }
//    }
//}
